If you can tell me on the screen or if you know how old your system is , I can provide more specific instructions for your DN81R.
No. The model number and password are unrelated. DN81R is a device identifier, not a password. annke dvr default password dn81r
If none of these work, check the sticker on the bottom or back of the DVR. Many Annke devices have a that includes a randomly generated password (often 8-10 characters). If you can tell me on the screen
To secure the Annke DN81R, the following steps must be implemented immediately: DN81R is a device identifier, not a password
Take a clear photograph of the information tag located on the metal undercarriage of the physical DVR unit.
If the above methods fail, the is your best option. This is a free, official software from Hikvision (ANNKE's OEM manufacturer) that can detect and help reset passwords for ANNKE devices on your network.
You may have missed a step in the hard reset process. Ensure you completely discharge residual power by unplugging for 10 minutes before resetting.